Marginal Homogeneity test / Stuart-Maxwell test - overview

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Find $p$ value corresponding to observed $X^2$ and check if it is equal to or smaller than $\alpha$

Example context

Subjects are asked to taste three different types of mayonnaise, and to indicate which of the three types of mayonnaise they like best. They then have to drink a glass of beer, and taste and rate the three types of mayonnaise again. Does drinking a beer change which type of mayonnaise people like best?

SPSS

Analyze > Nonparametric Tests > Legacy Dialogs > 2 Related Samples...

Put the two paired variables in the boxes below Variable 1 and Variable 2